SOLUTION: Cory and Melissa are racing electronic cars around a circular track. They begin at the same time going in the same direction. Cory's car completes a revolution in 50 seconds, whi
Question 569948: Cory and Melissa are racing electronic cars around a circular track. They begin at the same time going in the same direction. Cory's car completes a revolution in 50 seconds, while Melissa's car completes a revolution in 45 seconds. How long will it take them before both cars reach the starting point again simultaneously? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Mark their positions and the time when
the faster car, Melissa's, makes a complete
revolution.
Melissa's 1st revolution:
Cory's is 5 sec behind, which is
of a revolution for Cory
Melissa's 2nd revolution:
Cory has lost another 5 sec. He is of
a revolution behind
---------------
Melissa's 10th revolution:
Cory has lost sec, which is 1 rev for him
Melissa's 10 revolutions take sec
In 450 sec they will meet at starting point
